Xi'an TianRui Petroleum Machinery Equipment Co., Ltd.
Xi'an TianRui Petroleum Machinery Equipment Co., Ltd. Providing Cost-Effective Solids Control Solutions
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Oilfield Drilling Tools Drill Kelly Pipe Hex Kelly / Square Kelly
Product Overview
Kelly is located in the top of the drill string, with square and hexagonal. In rotary drilling, when it is drilling, kelly connected with square bushing and rotary bushing, transfer the ground rotary torque to drill pipe and to drive the drill bit,bearing the weight of the drill string.In the drilling of the turbine and screw, the weight of the drill string and the counter torque are supported.
Square drill kelly are made from AISI 4145H alloy bars that are quenched and tempered full length. A hardness range of 285 to 341 BHM and a minimum impact value of 54 Joules as per ASTM A 370 are maintained one inch bellow the surface at room temperature. To improve resistance to galling, all connections are phosphate-coated with an API thread compond. Each bar used to manufacture kellys has been examined with magnetic partice inspections and ultrsonic inspections.
Key Specialities of Square & Hexagonal Kelly
Technical Parameters of Our Square & Hexagonal Kelly
| Kelly size | 63.5 | 76.2 | 88.9 | 108 | 108 | 133.4 | 133.4 | ||
| 2 1/2 | 3 | 3 1/2 | 4 1/4 | 4 1/4 | 5 1/4 | 5 1/4 | |||
| Lengthdrive Section | LD Standard | 11280 | 11280 | 11280 | 11280 | 11280 | 11280 | 11280 | |
| LD optional | 15540 | 15540 | 15540 | 15540 | |||||
| Lengthoverall | L Standard | 12190 | 12190 | 12190 | 12190 | 12190 | 12190 | 12190 | |
| L optional | 16460 | 16460 | 16460 | 16460 | |||||
| Length Drive Section | DFL Across flate | 63.5 | 76.2 | 88.9 | 108 | 108 | 133.4 | 133.4 | |
| DC Across cornere | 83.3 | 100 | 115.1 | 141.3 | 141.3 | 175.4 | 175.4 | ||
| DCC Across flate | 82.55 | 98.43 | 122.7 | 139.7 | 139.7 | 171.45 | 171.45 | ||
| RC Radlue | 7.9 | 9.5 | 12.7 | 12.7 | 12.7 | 15.9 | 15.9 | ||
| RCC Radlue | 41.3 | 49.2 | 56.4 | 69.9 | 69.9 | 85.7 | 85.7 | ||
| Wall thickness eccentric bore | 11.43 | 11.43 | 11.43 | 12.07 | 12.07 | 15.88 | 15.88 | ||
| Upper box connection | Thread size and style LF | Standard | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG |
| Optional | 4 1/2 REG | 4 1/2 REG | 4 1/2 REG | 4 1/2 REG | 4 1/2 REG | ||||
| OD | Du Standard | 196.9 | 196.9 | 196.9 | 196.9 | 196.9 | 196.9 | 196.9 | |
| Du Optional | 146.1 | 146.1 | 146.1 | 146.1 | 146.1 | ||||
| Bevel diameter | Lu | 406.4 | 406.4 | 406.4 | 406.4 | 406.4 | 406.4 | 406.4 | |
| DF Standard | 186.1 | 186.1 | 186.1 | 186.1 | 186.1 | 186.1 | 186.1 | ||
| DF Optional | 134.5 | 134.5 | 134.5 | 134.5 | 134.5 | ||||
| Lower pin connection | Label | NC26 | NC31 | NC38 | NC46 | NC50 | 5 1/2 FH | NC56 | |
| Outsize diameter | 85.7 | 104.8 | 120.7 | 158.8 | 161.9 | 177.8 | 177.8 | ||
| LL | 508 | 508 | 508 | 508 | 508 | 508 | 508 | ||
| DF Bevel diameter | 82.9 | 100.4 | 116.3 | 145.3 | 154 | 170.7 | 171.1 | ||
| Inside diameter | 31.8 | 44.5 | 57.2 | 71.4 | 71.4 | 82.6 | 82.6 | ||
Competitive Advantages
1. We offer high quality products at competitive price.
2. Shortest delivery time.
3. Flexible payment terms.
4. Timely after-sale service.
5. Most of our equipment can be replaceable with international brands.
6. Our products have been exported to Argentina, Egypt, US, Australia, Romania, Pakistan, Dubai, Abu Dhabi, Iran, India, Indonesia, Vietnam, Malaysia and many other countries.